François Joseph de Béthune
- Born on January 7, 1719 in Paris
- Deceased on October 26, 1739 in Fontainebleau, at the age of 20 years
Parents
- Paul-François de Béthune (1682 - 1759), duc de Chârost, capitaine des gardes du corps du Roi, maréchal de camp
- Julie Gorge d'Entraigues (1688 - 1737), dame du palais de la Reine
Family
- Married on March 14, 1737 in Paris, with Marthe-Elisabeth de La Rochefoucauld, Mademoiselle de Roucy (1720 - 1784), marquise de Boves, dame du palais de la reine, issuing
- Armand Joseph (1738 - 1800)
Marie Elisabeth Pauline (1739 - 1740)